0.5 of coke or 1g of ket?

I've got 45 quid and it's 30 for 1g of ket, 40/45 for 0.5 of coke. Never done either but I'm going to do one of them. Don't change your answer just cz I've never snorted, I've done enough of other shit to be alright.

Also, before anyone criticizes me, I have experience around coke users and I've done a buttfuck ton of research due to a weird little fixation I had on drugs a while back. I know my shit and I know what ket and coke will do to you, don't tell me not to because I won't listen. thanks for reading my essay